According to "The World of Automobiles - an Illustrated Encyclopedia of the Motor Car", Sir Dugald Clerk tried them in 2-stroke engines in 1901, and Louis Renail experimented with them on 4 stroke engines in 1902. In the USA, Lee Chadwick in was putting them on his cars in 1909, the same year that that Buchi (in Switzerland) came up with the turbocharger for Diesel engines.
Seems to be a bit of confusion as to whether or not Chadwick was first selling supercharged cars in 1907, '08' or '09.
Seems that what as regarded as the "First Official Supercharged road car (as opposed to race car) is thought to be the 1923 Mercedes, first shown at an auto show in 1921, and which used the Roots supercharger design patented by Francis Roots (American) in 1860, a design Gottlieb Daimler had been trying in 1900! By the late 20's . The US Miller of 1923 was regarded as a Race car, so it was not until the late 20's that stuffers became "more common" on road cars, like the Blower Bentley and spread to cars like the Cord & "Doozy"
And if this ain't the answers U R looking for - I'll give up & shut up!
Last edited by Dave57210; 03-22-2009 at 12:28 AM.